2688639787914 has 32 divisors (see below), whose sum is σ = 5693975554176. Its totient is φ = 843437736960.

The previous prime is 2688639787901. The next prime is 2688639787943. The reversal of 2688639787914 is 4197879368862.

It is a self number, because there is not a number n which added to its sum of digits gives 2688639787914.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 634779 + ... + 2404209.

It is an arithmetic number, because the mean of its divisors is an integer number (177936736068).

Almost surely, 2^{2688639787914} is an apocalyptic number.

2688639787914 is an abundant number, since it is smaller than the sum of its proper divisors (3005335766262).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2688639787914 is a wasteful number, since it uses less digits than its factorization.

2688639787914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1784350.

The product of its digits is 1755758592, while the sum is 78.

The spelling of 2688639787914 in words is "two trillion, six hundred eighty-eight billion, six hundred thirty-nine million, seven hundred eighty-seven thousand, nine hundred fourteen".